LumaSense Technologies 3434i SF6 Leak Detector - Manual (Page 165)

Chapter 12
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BE6028-14 3434i SF6 Leak Detector LumaSense Technologies A/S
Page 165 of 191
1. For each filter being span calibrated, enter the No. of the filter
bank where you wish the Monitor to store the conversion
factors which will be calculated during the span calibration task.
2. Press MEASURE S3 S3 S1 then the following text will be
displayed:
PERFORM ZERO-POINT CALIBRATION?
NO YES
3.
If you only wish to span calibrate filters, follow the set-up of a
span calibration task by following the black arrows in the
schematic diagram shown in Fig.12.15 .
The following text will appear on the display:
CONNECT
(the name of the gas appears here)
XXXXXXmg/m 3
AND PRESS ENTER WHEN READY
Note: if the gas concentration on the “Analysis Certificate” is given in
ppm then the following formula can be used to convert from parts
per million units (ppm) to mg/m 3 :
For a gas at 20°C and at 1 atmosphere pressure:
Concentration (in mg/m 3 ) = Concentration (in ppm) x Molecular Weight (in g)
24,04
12.8.2 Performing a Span Calibration – Stand-alone Use
The general equipment necessary to perform a calibration task is
described in section 12.4 . Follow the procedure from step 1 to step 3
inclusive and then continue as follows:
1.
a. Connect the free-end of the Teflon tubing mentioned in step 3
to the pressure valve on a cylinder of calibration gas.
b. Press
¿ .
c. Gently open the pressure-valve on the gas cylinder and
regulate the flow of gas so that when the Monitor’s pump is